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Integration system and method for regulating and operating in parallel different high-voltage sources

Active Publication Date: 2014-10-09
COMPANY HIDRO ELECTRICA DO SAO FRANCISCO - CHESF
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

This invention is a system and method for regulating and parallelizing high voltage sources and energized gaps that meet strict criteria of reliability, safety, and performance. The system and method are applicable to any quantities and types of high voltage sources and energized gaps, and can automatically adjust voltage reference values to meet the requirements of a power substation. The system and method are cost-effective and easy to implement.

Problems solved by technology

One difficulty currently found relates to the integration of digital systems with existing technologies for supervision of the electrical system in a logical basis which facilitates efficiency and agility of the operation.
In addition, there are often difficulties in obtaining conclusive information about the regulatory and parallelism system deployed in a pre-existing substation.
There is also difficulty in finding economically viable solutions that meet strict criteria and are of high reliability and efficiency as set forth by the National Electrical System Operator (ONS).
Systems prior to the present invention did not have satisfactory digital control technologies, because existing solutions do not solve the problem of the substations having integration among voltage sources and / or energized gaps using dedicated electrical equipment with wires for voltage regulation and parallelism thereof.
In addition, previous systems: (a) do not meet the strict criteria of reliability, safety and performance; (b) do not meet all the requirements established by ONS network procedures; (c) do not meet the necessary operational features, including automatic changes of voltage reference values; (d) are not applicable for any quantities and types of high voltage sources and / or energized gaps, such as transformers, and for any amounts of voltage levels; (e) are not equipment and / or manufacturer independent; (f) are not inexpensive.
These devices do not interact with other devices of different manufacturers and models in a satisfactory manner, in particular, in large quantity and also do not efficiently integrate with existing alarms and supervision.

Method used

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  • Integration system and method for regulating and operating in parallel different high-voltage sources
  • Integration system and method for regulating and operating in parallel different high-voltage sources

Examples

Experimental program
Comparison scheme
Effect test

example 1

Regulation and Parallelism of Three Phase Power Transformers

[0068]In a preferred embodiment, the invention solves a problematic situation in transformers with the following characteristics:

[0069]i) integration of a 230 / 69 kV power transformer 04T3 of a substation;

[0070]ii) power transformer 04T3 has tap equivalence different from power transformers 04T1 and 04T2 of said substation;

[0071]iii) difficulties in obtaining conclusive information about the regulation and parallelism system deployed in said substation; and

[0072]iv) lack of engineering solution to make the regulation and parallelism of power transformers 04T1, 04T2 and 04T3 of this substation.

[0073]Solution Employed

[0074]The formulation to solve the problem was accomplished through studies of:

[0075]i) tap equivalence table of 230 / 69 kV power transformers 04T1, 04T2 and 04T3 of said substation;

[0076]ii) instruction of load levels of the substation;

[0077]iii) philosophy of regulation and parallelism of power transformers of a ...

example 2

Regulation and Parallelism of Single Phase Power Autotransformer Banks

[0118]In this preferred embodiment, tests were carried out with the technical specification of the application logic of regulation and parallelism of single phase autotransformer banks 05T1, 05T2 and 05T3 of an SE:

TABLE 2Tap equivalence in the parallelism:05T105T105T105T205T205T205T305T305T3(Phase(Phase(Phase(Phase(Phase(Phase(Phase(Phase(PhaseA)B)C)A)B)C)A)B)C)5, 65, 65, 65, 65, 65, 61117, 87, 87, 87, 87, 87, 82229, 109, 109, 109, 109, 109, 10333. . .......... . .......... . .........29, 3029, 3029, 3029, 3029, 3029, 3013 13 13 31, 32,31, 32,31, 32,31, 32,31, 32,31, 32,14 14 14 333333333333

[0119]Note 1: Disregard 05T3 taps≧15, because there is no equivalence of this tap on 05T1 and 05T2 taps.

[0120]Note 2: When autotransformer banks 05T1 and / or 05T2 are on tap 33 and / or 05T3 is on tap 14, it should signal be “Upper Limit Actuated” and block switching to increase taps.

[0121]Note 3: When autotransformer banks 05T1 a...

example 3

Regulation and Parallelism of Single Phase Power Autotransformer Banks and Three Phase Power Transformers

[0159]In this preferred embodiment, the technical specification of the application logic of regulation and parallelism was performed with two single phase autotransformer banks 04T1, and 04T2 and a three phase transformer 04T3 of an SE:

TABLE 3Tap equivalence in the parallelism:04T104T104T104T204T204T2(Phase(Phase(Phase(Phase(Phase(PhaseA)B)C)A)B)C)04T35, 65, 65, 611117, 87, 87, 811129, 109, 109, 103333. . ........ . ........ . .......29, 3029, 3029, 3013 13 13 13 31, 32,31, 32,31, 32,14 14 14 14 333333

[0160]Note 1: Disregard 04T2 taps and ≧15 04T3 taps, because there is no equivalence of these taps on 04T1 taps.

[0161]Note 2: When autotransformer banks 04T1 and / or 04T2 are on tap 33 and / or 04T3 is on tap 14, it should signal be “Upper Limit Actuated” and block switching to increase taps.

[0162]Note 3: When autotransformer banks 04T1 and / or 04T2 are on tap 5 and / or 04T3 is on tap 1,...

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Abstract

The present invention provides systems and methods for integration and for the regulation and parallelism among different models of voltage sources and / or high voltage energized gaps. In a preferred embodiment, the present invention provides an efficient and inexpensive way to integrate equipment such as transformers, in any amounts, with different voltages and different specifications in the same parallelism logic, meeting strict criteria and requirements.

Description

FIELD OF THE INVENTION[0001]The present invention relates to the field of Electrical Engineering. More specifically, the present invention provides systems and methods for integration and for the regulation and parallelism among different models of voltage sources and / or high voltage energized gaps. In a preferred embodiment, the present invention provides an efficient and inexpensive way to integrate equipment such as transformers with different voltages and different specifications in the same parallelism logic, meeting strict criteria and requirements.BACKGROUND OF THE INVENTION[0002]Power equipment are widely used for the transformation of voltages and currents with high power values in substations (SEs), such as, for example, transformers. One difficulty currently found relates to the integration of digital systems with existing technologies for supervision of the electrical system in a logical basis which facilitates efficiency and agility of the operation. One such example ar...

Claims

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Application Information

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IPC IPC(8): G05F1/10
CPCG05F1/10H02J3/04H02J3/38
Inventor LISBOA, LUCIANO ANTONIO CALMON
Owner COMPANY HIDRO ELECTRICA DO SAO FRANCISCO - CHESF